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The present invention is a surface controlled subsurface safety valve (SCSSV) for use in a well, preferably a hydrocarbon producing well. The SCSSV comprises a valve body having a longitudinal bore for fluid to flow through, a bore closure assembly, a pressure balanced drive assembly, and a fail saf

The present invention is a surface controlled subsurface safety valve (SCSSV) for use in a well, preferably a hydrocarbon producing well. The SCSSV comprises a valve body having a longitudinal bore for fluid to flow through, a bore closure assembly, a pressure balanced drive assembly, and a fail safe assembly. The bore closure assembly is positioned and normally biased to close the bore to fluid flow. The drive assembly is coupled to the bore closure assembly for driving the bore closure assembly to an open position. The fail safe assembly is positioned and configured to hold the bore closure assembly in the open position in response to a hold signal and to release the valve to return to the safe, closed position upon interruption of the hold signal.

대표청구항 ▼

The present invention is a surface controlled subsurface safety valve (SCSSV) for use in a well, preferably a hydrocarbon producing well. The SCSSV comprises a valve body having a longitudinal bore for fluid to flow through, a bore closure assembly, a pressure balanced drive assembly, and a fail saf

The present invention is a surface controlled subsurface safety valve (SCSSV) for use in a well, preferably a hydrocarbon producing well. The SCSSV comprises a valve body having a longitudinal bore for fluid to flow through, a bore closure assembly, a pressure balanced drive assembly, and a fail safe assembly. The bore closure assembly is positioned and normally biased to close the bore to fluid flow. The drive assembly is coupled to the bore closure assembly for driving the bore closure assembly to an open position. The fail safe assembly is positioned and configured to hold the bore closure assembly in the open position in response to a hold signal and to release the valve to return to the safe, closed position upon interruption of the hold signal. ng satisfactory fluidity of the semi-molten metal M. A grain size of the solid fraction in the melt M is set to not more than 0.13 times the average thickness of the product portion of the thin molded product and a molten metal velocity at the product gate is set to not less than 30 m/s and, moreover, a solid fraction Fs (%) of the semi-molten metal M and a grain size D (μm) of the solid phase of the semi-molten metal M are set so as to define the relationship Fs×D≤1500. ensor switch, and (ii) switching of the one shot valve to the closed position. 10. The controller according to claim 1, further comprising: an air distribution valve bank, comprising a plurality of valves, each of the plurality of valves being associated with (i) one of the plurality of pneumatic switches and (ii) one of the plurality of pneumatically powered components of the volumetric pocket filler; pilot lines, connecting the pneumatic switches to their respective valves of the air distribution valve bank; and air supply lines, configured to connect each of the valves of the air distribution valve bank to an associated pneumatically powered component of the volumetric pocket filler, whereby at least some of the plurality of pneumatic switches provide pneumatic signals solely to switch the respective valves of the air distribution valve bank, and pneumatic power for actuation of the pneumatically powered components of the volumetric pocket filler is provided by the respective valves of the air distribution valve bank. 11. A volumetric pocket filler for measuring and dispensing product into a container, comprising: a pneumatically powered measuring and dispensing apparatus, configured to measure and dispense a discrete quantity of product into a container; and a controller, for controlling the operation of the measuring and dispensing apparatus, comprising: a pneumatically powered actuator, moveable along a motion path; and a pneumatic switch, pneumatically coup